Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD/mV Input Module User Manual - Manual (Page 34)

Publication 1797-6.5.2 - February 2001
3-10 How to Install Your FLEX Ex Thermocouple/RTD/mV Module
Connecting Wiring to the
FLEX Ex Thermocouple/
RTD/mV Module Inputs/Outputs
Each input can be operated from a thermocouple (TC), resistance
temperature detector (RTD), or millivolt. Do not apply any
non-intrinsically safe signals to this module.
When using an intrinsically safe electrical apparatus according to
EN50020, the European directives and regulations must be followed.
The channels in this module are electrically connected to each other
and have a common plus-line.
When interconnecting several lines, you must consider the total
accumulated power and check for intrinsic safety.
Connections for the 1797-IRT8 Module
Thermocouple
FLEX Bus
Bus
uC
+V
Power
Supply
-V
L
H
-
+
+
mV
-
2W RTD 3W RTD 4W RTD
-
+
CJC
CJC
+ -
Ch 0 Ch 1 Ch 2 Ch 3
+V -V +V -V
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
L H
+ -
L H + - L H + - L H
+ -
Ch 4 Ch 5 Ch 6 Ch 7
L H
+ -
L H
+ - L H + - L H
CJC
0+ 0-
CJC
1+ 1-
Chassis
GND
for shield
Row A
Row B
Row C
Chassis
GND
for shield 41505
No connection allowed to terminals 36 and 49